How is the methodology quality assessed in vitro studies?

I am doing a systematic review with in vitro and in vivo (animals and human models) studies about different treatments to improve bone remodelling.

I used to use, to describe the methodological quality of the selected articles, the PEDro scale and the guidelines of the Dutch Institute for Healthcare Improvement (CBO). PEDro scale assesses the risk of bias of RCTs to provide a global overview of internal validity of the studies. But this does not rate the external validity. For this reason it is necessary to determining the level of Evidence using the Dutch CBO Guidelines.

But, my questions is...these scales and guidelines, could be used in vitro studies too?or what other scales or guidelines should I use?

Thank you so much,